14 Questions
What is the process of transfer of energy without the actual movement of particles of the medium due to temperature difference called?
Conduction
Why are rubber, wood, and glass considered bad conductors of heat?
They do not conduct heat properly.
What are the three main methods of heat transfer mentioned in the passage?
Conduction, convection, and radiation
In which materials are free electrons responsible for heat flow?
Metals
What is the passage of thermal energy from a body at a higher temperature to a body at a lower temperature called?
Heat transfer
What are liquids and gases categorized as in terms of heat conduction?
Bad conductors
Which material, despite being a liquid, is known as a good conductor of heat?
Mercury
Which of the following is responsible for the slow process of conduction in good conductors like metals?
Interatomic bonds between atoms
Why are rubber, wood, and glass considered to be poor conductors of heat?
The lack of free electrons in their structure
What is the main mechanism for heat transfer in gases?
Radiation through electromagnetic waves
How do metals facilitate the transfer of heat within their structure?
Through the vibration of free electrons
Which material, despite being a liquid, is known as a poor conductor of heat?
Mercury
What type of energy transfer involves actual movement of medium particles?
Convection
Why is conduction considered a slow process compared to other forms of heat transfer?
The need for vibrating molecules to directly collide with colder ones
Study Notes
Heat Transfer
- Heat transfer occurs from a body at a higher temperature to a body at a lower temperature
- It occurs through conduction, convection, and radiation, as well as condensation and evaporation
Conduction
- Conduction is the transfer of energy without the movement of particles due to a temperature difference within a body
- Heat is transferred, but not atoms or molecules
- Good conductors like metals have free electrons responsible for heat flow
- When one end of a metal bar is heated, atoms at the hot end absorb energy and vibrate more vigorously
- Energy is transferred to neighboring atoms through interatomic bonds, causing them to vibrate
- Conduction is a slow process
Conductors and Insulators
- Metals are good conductors of heat
- Rubber, wood, glass, and most liquids and gases are bad conductors
- Mercury is an exception, being a liquid that is a good conductor
Learn about the basics of heat transfer, including conduction, convection, and radiation. Understand how thermal energy moves from a higher temperature body to a lower temperature body through different processes like conduction without actual movement of particles.
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